ah, thanks for commenting your suggestions!
1. i am going to implement sounds eventually, just not yet for the moment :)
2. it runs super slowly :( because at that point, the game probably is producing a LOT of zombies, but when i get around to coding the levels, it wont be as laggy, so dont worry ;)
3. once i get around to making the levels, i will add a win and lose screen. This has been in my mind for a LONG time but i have not added it due to it currently being one endless level.
4. I agree to adding a shovel. I will be implementing it eventually, probaby as soon as possible :)
5. oh. Chomper is just SERIOUSLY BROKEN.
so those are my replies to your questions, and i really appreciate you commenting them for me! It personally has been really tough managing the development of 3 games at once, and many more that are soon to come. Anyways, have a good day! :P